کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
4907554 | 1426572 | 2017 | 24 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
NiCo/C-N/CNT composite catalysts for electro-catalytic oxidation of methanol and ethanol
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
In this work, the catalyst precursor Ni3Co1/C-N was firstly fabricated by direct pyrolysis of NiCo salts/polyaniline (PANI) composite at 800 °C under N2 atmosphere. Then the obtained Ni3Co1/C-N and multi walled carbon nanotubes (CNTs) particles were ground together to synthesize the Ni3Co1/C-N/CNT catalysts with different CNT mass percentages: Ni3Co1/C-N/CNT(15%), Ni3Co1/C-N/CNT(25%), Ni3Co1/C-N/CNT(35%), Ni3Co1/C-N/CNT(45%). The catalysts were characterized by SEM, TEM, XRD and XPS techniques. Cyclic voltammetry (CV), chronoamperometry (CA) and electrochemical impedance spectroscopy (EIS) were used to study the electrocatalytic activity of the prepared catalysts for oxidation of methanol and ethanol in alkaline media. Results show that among the prepared catalysts, the Ni3Co1/C-N/CNT(35%) presents the best catalytic activity for oxidation of both methanol and ethanol. The current density at 0.85 V for oxidation of methanol and ethanol on the Ni3Co1/C-N/CNT(35%) reaches as high as 213 mA cmâ 2 and 181 mA cmâ 2, respectively, which has exceeded the results on the state of the art catalysts. For oxidation of both methanol and ethanol, the Ni3Co1/C-N/CNT(35%) catalyst also exhibits smaller electron transfer resistances, larger reaction rates and more stable electrocatalytic activity.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Electroanalytical Chemistry - Volume 803, 15 October 2017, Pages 95-103
Journal: Journal of Electroanalytical Chemistry - Volume 803, 15 October 2017, Pages 95-103
نویسندگان
Zhongliang Deng, Qingfeng Yi, Yuanyuan Zhang, Huidong Nie,